baber/WOPTO huggingface dataset:
Patent GB-1533774-A (GB)
Title: Adaptive braking modulator
IPC: B60T8/40
Filed: 1976-02-20
Abstract: 1533774 Pressure reducing valves; valves BENDIX CORP 20 Feb 1976 [10 March 1975] 06854/76 Headings F2F and F2V An adaptive braking modulator 32, for reducing brake pressure in response to an electrical signal, comprises a piston 64 acted on by a high pressure, communicated from a booster via inlet 48, valve 94 and passage 86 during normal brake application, to maintain valve 66 in an open condition allowing unrestricted flow between an inlet port 36 from a master cylinder and an outlet 38 to the brakes, the modulator also comprising a solenoid to operate valve 94 such that communication between inlet 48 and passage 86 is closed by rod 120 when an incipient skid signal is detected and communication is simultaneously opened between passage 86 and a low pressure outlet 44 causing rightward movement of piston 64 under the action of spring 78 resulting in the closure of valve 66 to isolate inlet 36 from outlet 38. Continued operation of the solenoid results in the expansion of chamber 54 under the action of the pressure therein to further reduce brake pressure. The inlet 48 is also permanently communicated with a chamber 104, the pressure therein acting on a piston 70 to maintain a valve 72 in a closed position unless there is a failure causing a drop in booster pressure whereupon spring 78 will open valve 72 to allow unrestricted flow from inlet 36 to outlet 38 regardless of the position of valve 66. The pressure at inlet 48 is communicated to the hollow inside of piston 122 housing rod 120 through passage 102, 131, splines 133 and passages 134 so that the solenoid valve need not overcome any pressure differential across rod 120 and thus may be operated by a relatively small current. In a second embodiment a first valve, being normally open to connect the inlet from the master cylinder to the brakes, is operated by a piston normally acted on by low pressure and a second valve controlling the expansible chamber to reduce brake pressure is operated by a piston normally acted on by high booster pressure. Operation of the solenoid moves a spool valve to connect the piston operating the first valve to high pressure to close it while simultaneously connecting the piston operating the second valve to low pressure to open it. Two valves as described above are incorporated into a split front/rear braking circuit, one in each circuit, the system also including power steering run off the same pump as the brakes.
Patent GB-1393867-A (GB)
Title: Process of pyromellitic dianhydride
IPC: C07C51/573
Filed: 1974-02-14
Abstract: 1393867 Purification of pyromellitic dianhydride GELSENBERG AG 14 Feb 1974 [16 Feb 1973] 6867/74 Heading C2C Pyromellitic dianhydride having a purity of at least 95% is purified by distillation in a process comprising a first distillation step carried out at a pressure of up to 300 Torr and a temperature of up to 350 C. in which up to 20% of the distillate is separated off as a first fraction, and a second distillation step carried out at a lower pressure and a temperature of up to 325 C. to obtain a main fraction of the dianhydride, the distillation being continued until the residue is not in excess of 12% by weight of the original impure dianhydride. The impure pyromellitic dianhydride is preferably obtained from the catalytic gas phase oxidation of 1,2,4,5-tetraalkylbenzene with a free oxygen-containing gas.
Patent GB-438879-A (GB)
Title: A new or improved leg rest
IPC: A47C16/02
Filed: 1935-02-26
Abstract: 438,879. Leg-rests; bed-rests. GREENOFF, A., Maradar, Low Moor Road, Bispham, Blackpool. Feb. 26, 1935, No. 7085. [Class 52 (ii)] A folding leg-rest comprises a foot member consisting of uprights 1 connected by rails 2, and a leg receiving member 4 comprising a plywood board connected to the uprights 1 by a U-shaped wire 8 the base 6 of which passes under and is pivotally secured to the board 4. The latter is gapped at 5 to engage the uprights 1 so as to allow a spring catch 10 to contact engage one of the cross rails 2. The upper inturned ends of the wire 8 are sprung into holes 3 on the uprights 1 ; several alternative holes being provided. The device may also be used as a bed-rest.
Patent GB-575863-A (GB)
Title: A new or improved method of gear finishing
IPC: B23F19/06
Filed: 1944-04-18
Abstract: 575,863. Gear cutting. HOWDEN, J. R. (National Broach & Machine Co.) April 18, 1944, No. 7164. [Class 83 (iii)] In a method of finishing involute toothed gears by the intermeshing generator crossedaxis process, a cutter tooth 30 after re-grinding to sharpen the cutting edges 23 has its chordal thickness a reduced and the centre distance of the cutter and work is accordingly diminished to utilise a chordal tooth thickness a<1> equal to the original thickness a, the outside diameter of the cutter being also reduced as at 32 to produce an addendum c which is greater than the original addendum b. In an involute gear of 7-9 diametral pitch the chordal thickness a is reduced by about 0.004 inch on the first regrind and the outside diameter of the cutter is reduced by an amount which will increase the addendum by 0.002 to 0.01 inch, preferably about 0.005 inch. At each subsequent regrinding, until the tooth lands 22 have been ground away, the addendum is increased still further.
Patent GB-703965-A (GB)
Title: Improvements in operating devices for windows or other vertically slidable elements provided with automatic locking means
IPC: E05C17/64
Filed: 1952-03-20
Abstract: 703,965. Locking rods. ETABLISSEMENTS G. KLEIN & CIE. March 20, 1952 [March 21, 1951], No. 7180/52. Class 80 (3) [Also in Group XXV] In an operating device for windows or other vertically sliding elements which are adapted to be held in any position by automatic locking means, there are interposed between the locking means and a part operatively connected with the slidable element, elastic means which normally keep the locking means operative, and rigid means which bring the locking means out of action when the sliding element is moved by a force capable of overcoming the action of the elastic means. In the example shown, a sliding window 1 is connected through chains 4 and sprockets 5 to a shaft 6 on which is mounted a balancing device constituted by a torsion spring 7. The automatic locking means includes a braking spring 11 which acts by expansion of its turns against a fixed sleeve 12, both ends of the spring being bent inwardly to form radial fingers 13, 14, Fig. 4. A sleeve 15, pinned to the shaft 6, has longitudinal extensions 22<SP>1</SP> and 22<SP>2</SP>, one longer than the other, with a groove between them. Each of the fingers 13, 14 of the spring bears against an edge of one of the extensions, so that rotation of the shaft 6 in either direction causes diametral contraction and consequent release of the spring. A stabilizing spring 17 is fixed at one end to a member 18 keyed to shaft 6 and at the other end to a sleeve 21 freely rotatable on the shaft and having a projection 23 located opposite the extension 22<SP>2</SP>. Urged by spring 17, projection 23 bears against finger 13 of spring 11 and tends to expand it into firm contact with sleeve 12, thus holding window in adjusted position. When the window is forcibly raised or lowered, rotation of the shaft 6 causes release of the spring, through the contact of one or other of the projections 22<SP>1</SP>, 22<SP>2</SP> with one of the fingers 13, 14. To adjust the tension of spring 17, a rod 24 is screwed into member 18 to hold it fixed, the screw 19 keying member 18 to shaft 6 is removed, and the shaft rotated to effect adjustment of the tension. In a modification the spring 11 is replaced by a ball-clutch device as shown in Fig. 6, in which extensions 15<SP>1</SP> project from the sleeve which is pinned to the shaft, and wings 21' project from the sleeve which is free on the shaft but urged by the locking spring in the direction to wedge the balls 11' between the fixed sleeve 12 and cam surfaces 30.
Patent GB-828245-A (GB)
Title: High-vacuum a.c. arc melting of reactive metals
IPC: H05B7/00
Filed: 1957-03-05
Abstract: 828,245. Arc melting electrodes. UNION CARBIDE CORPORATION. March 5, 1957 [March 16, 1956], No. 7194/57. Drawings to Specification. Class 39(3) A method of arc melting reactive metals, e.g. titanium, under sub-atmospheric pressure with alternating current includes employing a consumable electrode comprising a compacted mass of spongy or powdered reactive metal in which is incorporated a compound of a metal having a lower ionization potential than that of the reactive metal. Suitable compounds, e.g. chlorides, are those of alkali metals or barium. The compound is incorporated in the electrode to provide from 0.03% to 1.00% by weight of the alkali metal or barium. It is stated that the presence of the compound stabilizes the A.C. arc at low pressures, e.g. from 1 to 1000 microns of mercury, thus allowing the electrode feed rate to be automatically controlled.
Patent GB-270653-A (GB)
Title: Improvements in steam generators
IPC: F22B37/14
Filed: 1927-03-16
Abstract: 270,653. International Combustion Engineering Corporation, (Assignees of Brunt, J. van.). May 5, 1926, [Convention date]. Water-tube boilers.-The downcomers of a furnace-shaped boiler are placed within the boiler casing in the path of combustion gases between the furnace chamber and an air heater. A boiler comprises four cross drums 8 - - 11 interconnected by front, rear and roof water walls a, d, c, and a bank of spaced tubes 18, the tubes 13 of side water walls b connecting headers 14, 15, which lead respectively to drums 8, 11. A bank of downcomer tubes 19 connect drums 10, 8, and constitute an economizer section of the boiler. A superheater 27 is located between the rear wall d and the downcomer tubes. Baffling is provided to direct combustion gases from beneath the furnace to the air heater 26. Burners 28 are situated at the four corners of the combustion space, preheated air being supplied thereto through ducts 30 to produce a vortex. In a modification the drum 9 is replaced by separate headers for each of the tubes of the front wall a the bank 18 then constituting vertical rows of tubes the number of which is increased or diminished according to the desired temperature of the exit gases. Specification 257,240 is referred to.
Patent GB-1486062-A (GB)
Title: Separable slide fastener and method of forming the same
IPC: A44B19/38
Filed: 1975-02-21
Abstract: 1486062 Separable end stop for sliding clasp fasteners TEXTRON INC 21 Feb 1975 [22 Feb 1974] 7334/75 Heading E2S A separable end stop, for a sliding clasp fastener 10 comprising a support member 26 to be attached to one stringer tape 12 of a fastener, a pin member 28 to be attached to a second stringer tape 14 and a retainer 30 to be permanently secured to the support member 26 and to receive a leg 46 of the pin member 28 retractably, is characterised in that the retainer has a channel 86 to receive the leg 46 and the support member 26 has a wedge-shaped head 40 to enter a correspondingly-shaped pocket 102 in the retainer 30, the pocket having a mouth such that the head 40 is retained in the pocket 40 after being forced through the mouth. As shown, gaps 116, 118, free of fastener elements 16, 18, are formed at the lower ends of the two tapes 12, 14, Fig. 7, and a slider 20, and retainer 30 are threaded, in turn, over the fastener elements 16, the support member 26, made e.g. of plastics, then being secured, e.g. by supersonic welding to the gapped portion 116 of the tape 12 whereupon the retainer 30, made of metal, is pushed down over the support member 26 until the end of the head portion 40 snaps behind a pair of bosses 108, 110 on upper and lower wings 60, 62 of the retainer and into the pocket 102 firmly to lock the support member 26 in the retainer 30. Islands 112, 114, which project from a partition 64 which interconnects the wings 60, 62 bear against the straight side 34 of the support member 26, a recess 98 between the islands 112, 114, facilitating the passage of the fastener elements 16 through a channel 84 during the initial assembly. The lower end of the face 34 engages bosses 104, 106 which project from the partition 64, which with the wings 60, 62 and flanges 68, 72 define the channel 86 which is adapted removably to receive the pin 28 which is made e.g of plastics and which is secured to the gapped end portion 118 of the tape 14. The pin 28 has a tongue 54 with a guide tooth 56 which is adapted in the assembled condition of the end stop, to be received in a corresponding groove 44 in a flange 42 which extends from a shank portion 32 of the support member 26. The latter and the pin 28 each have flap 58, the flap of the support member 26 being secured to the tape 12.
Patent GB-311498-A (GB)
Title: Latches for winding drums
IPC: B66D5/34
Filed: 1928-03-09
Abstract: 311,498. Mendler, C. March 9, 1928. Roller blinds, catch arrangements for.-A catch arrangement for winding drums consists of an outer shell 1 formed with one or more pockets 2, an inner rotatable shell 6 formed with an annular row of apertures through any one of which a catch member, such as a ball 19, may engage a vertical face 3 of a pocket 2 to secure the inner shell against rotation in cue direction. Figs. 4, 5 show the arrangement applied to a spring roller blind the outer shell 1 being secured to the stem 9, of the roller, which is non-rotatably supported in a wall bracket &c. The inner member 6 is secured to the roller which is operated in the usual way by a spring 22. The pockets 2 are formed with an inclined surface to displace the ball 19 from the pocket when the roller, with the shell 6, is rotated in one direction.
Patent GB-367589-A (GB)
Title: Improvements in tanks and the like containers
IPC: B61D5/00
Filed: 1931-03-12
Abstract: 367,589. Tanks. EXPRESS DAIRY CO., Ltd., 26, Tavistock Place, and ASHWORTH, N. B., 1, Brookland Close, both in London. March 12, 1931, No. 7685. [Class 69 (i).] A tank 1, Fig. 2, is provided with a guard 2, spaced to provide an air insulation space, the guard being detachably mounted by longi. tudinal ribs 5, straps 4, angle-irons 6, and straps 7. The straps 7 are applied to a casing 10, Fig. 4, enclosing a lagging 11 of material such as slag wool.
Patent GB-669412-A (GB)
Title: Improvements in or relating to impulse-responding circuits for use in telephone or like signalling systems
Inventor: IRELAND ERIC BERTRAM
IPC: H04Q1/442
Filed: 1949-03-22
Abstract: 669,412. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. March 9, 1950 [March 22, 1949], No. 7714/49. Class 40 (iv). [Also in Group XL (b)] In an A.C. impulse-responding circuit, the retarding effect produced by a rectifier network MRA on the release of the impulsing relay J is compensated by energizing an opposed winding of J prior to its release. The first impulse produces sluggish operation of relay J due to the current drain to the equipment ahead. Thus, in a modification, during each operation of the impulsing relay after the first its second winding is shunted so causing its operating time to be constant irrespective of the particular impulse to which it is responding.
Patent GB-113052-A (GB)
Title: Improvements relating to Boat Lowering Gear.
Inventor: HENSMAN WILLIAM
IPC: B63B23/18
Filed: 1917-05-30
Abstract: 113,052. Hensman, W. May 30, 1917. Pulley-blocks.-Pulleys e for use in boat-lowering gear are prevented from rotating during lowering by an elliptical roller a, or sphere, becoming wedged between the sheave and an inclined plane b.
Patent GB-472228-A (GB)
Title: Process for the manufacture and use of liquid self-hardening compositions derived from synthetic resins
IPC: C08L61/06
Filed: 1936-03-16
Abstract: Solutions of hardenable synthetic resins, e.g. phenol-, urea-, or thiourea-formaldehyde condensation products, are ripened to syrupy semi-liquids by means of acid hardening accelerators, alone or mixed with known catalytic hardening agents, and are then dispersed in organic liquid solvents of the unripened resin whereby further ripening is prevented until use, e.g. as paints or binders for plastic masses.  The product may be neutralized, e.g. by ammonia, hydrazine, or hydroxylamine; it may be mixed with solutions of hardenable or unhardenable resins, linseed oil varnish, linseed oil artificial resin solutions, e.g. phthalic acid-glycerine condensation products with linseed oil varnishes, or urea-, thiourea-, or phenol-formaldehyde-condensation products condensed with linseed oil, or with wax-like compositions which dissolve or are dispersable in the solvents of the resin; it makes self-hardening other hardenable resins in solution.  The ripening may be effected at 5--15 per cent concentration and further ripening broken off by neutralization, or at 40--50 per cent concentration followed by dilution to 5--15 per cent resin content and breaking off of the ripening.  Especially suitable catalysts are mixtures of acids with organic oxychlorides, alkyl sulphates, halogenated ethers or esters, acetyl chlorides or trichlorhydrocarbons such as benzotrichloride.  Acids specified are boric, boric anhydride, phosphoric, hypophosphoric, phthalic, oxalic, lactic, nitric, and sulphuric.  Solvents specified are alcohol, ketones, e.g. acetone, and ethyl acetate.  The products p  may be used as glazes, alone or mixed with starch; 0,1--2,0 per cent of organic hardening agents may be added at the time of use.  The products also form binding agents for mineral powder, cellulose dust or fibres, starches, and fat-free carcin; the plastic masses produced may be pressed cold or warm or extruded.  The Specification as open to inspection under Sect. 91 describes the preparation of ripened self-hardening liquid organic glazes, mixed or not with glaze-improving substances, by action or dissolved hardenable resins in the b -condition of about 0,1--3,0 per cent of inorganic or organic mono- or poly-valent acids or acid salts soluble in alcohol, acetone, or artificial-resin solvent hydrocarbons, or mixtures thereof.  This subject-matter does not appear in the Specification as accepted.
Patent GB-781847-A (GB)
Title: Improvements in air injectors
IPC: F04F5/32
Filed: 1956-03-13
Abstract: 781,847. Injectors. SPECIALTIES DEVELOPMENT CORPORATION. March 13, 1956 [May 10, 1955], No. 7789/56. Class 71. A compressed air actuated injector suitable for inflating a pneumatic jack comprises a venturi tube 11, 14, 12 having a pivoted closure disc 27 engaging a seat 15 surrounding the throat 14 on the downstream side thereof and openable towards the divergent portion 12 of the venturi, and a compressed air supply orifice 49 in a nozzle head 47 in the convergent portion 11. The pivoted disc 27 is opened against a spring 38 by a compressed air actuated piston 41 linked thereto by engagement of a slotted nut 44 with a pin 46 extending between legs 32 of a bracket 29 hinged about a pin 34 secured to the injector casing. The piston 41 is supplied with compressed air through a flexible hose 55 connected to the main compressed air inlet 51. On discontinuing the supply of conpressed air the piston chamber is vented to atmosphere through the hose 55 and orifice 49, and the disc 27 is closed by its spring thus trapping air in the venturi portion 12. Reopening of the disc 27 is effected by an external handle 37, Fig. 2 (not shown) to allow deflation of the jack cylinder.
Patent GB-308885-A (GB)
Title: Improvements relating to the recovery of acetone from gases containing the same
IPC: B01D53/14
Filed: 1928-03-14
Abstract: 308,885. Ormandy, W. R. March 14, 1928. Volatile liquids, recovering. - Acetone is recovered from gases containing it, e.g. air used in drying operations in the production of artificial silk, by absorption in an inorganic acid in a fairly high state of concentration but not sufficiently concentrated to decompose the acetone. The process is carried out by circulating the gases containing the acetone through towers in counter current to the acid. Sulphuric and phosphoric acids are mentioned as suitable, the sulphuric acid after absorption of the acetone being diluted to about 50 per cent acid before driving off the actone. Sulphuric acid of 150‹-110‹ Tw. is suitable and with a strength of 130‹ Tw. it is possible to obtain concentrations of acetone of 10, 20, 30 and 40 per cent of the acid used when the amount of acetone in the air is only 1.8, 4.6, 8.5, and 14.2 gas per cubic metre of air. With phosphoric acid good results are obtained with concentrations of 130-150‹ Tw.
Patent GB-1499982-A (GB)
Title: Cartons
IPC: B65D5/4805
Filed: 1975-04-07
Abstract: 1499982 Cartons THOMAS REED & CO Ltd (Robertson Paper Box Co Inc) 7 April 1975 [21 Feb 1974] 7859/74 Heading B8P A collapsible carton includes an internal partition wall j and a pair of dividers in regions at respective sides of the partition wall j, each divider including two zones n, p, q, r connected by intervening portions, which zones and portions can take up a coplanar configuration in the collapsed state of the carton. The carton which is folded from a single blank, also includes side and end walls e, m, g, h, and preferably top and bottom closure flaps c, b, k<SP>1</SP>, a, d, l. One divider includes an outer zone n, which is folded over and glued to the wall e, while the other has a zone q attached to the partition wall j, the intervening portions 1-4, 5-8 being defined by cuts 11-13 and score lines 14 in the blank.
Patent GB-1380393-A (GB)
Title: Sealing fibres into gaps
IPC: B29C70/84
Filed: 1971-03-26
Abstract: 1380393 Osmosis IMPERIAL CHEMICAL INDUSTRIES Ltd 16 March 1972 [26 March 1971] 7911/71 Heading B1X [Also in Division D1] An aperture 4 in a tubeplate 2 is sealed by longitudinally vibrating a bundle 1 of parallel filaments whilst is passes through a bath of epoxy resin 8. The resin, which is thereby worked between the fibres subsequently sets. In an apparatus for determining osmotic pressure or performing reverse osmosis the bundle comprises hollow nylon filaments of 50 micron outside diameter that have been doubled over and inserted into the aperture. The bundle is longitudinally vibrated for 1 hour at 10 cycles 1 second and an amplitude of 12 mm. Suction or excess pressure may be applied to assist the the penetrationof the resin. The tube plate is bolted to a pressure vessel and the walls of the filaments act as semipermeable membranes.
Patent GB-895400-A (GB)
Title: Pentacyclic steroids and methods of preparing the same
Filed: 1960-03-07
Abstract: The invention comprises 16a ,17a -(1-lower alkoxy)-alkylidenedioxy steroids, wherein said lower alkoxy group contains 1-6 carbon atoms, and the alkylidenedioxy group contains 1-7 carbon atoms and a process for the preparation thereof by reacting the corresponding 16a ,17a -dihydroxy steroid with an ortho ester of the formula R2C(OR1)3, in which R1 is a lower alkyl and R2 is H or a lower alkyl radical, wherein the lower alkyl and lower alkoxy groups contain 1-6 carbon atoms.  Preferred products of the invention have the formula <FORM:0895400/IV (b)/1> wherein R is H or a lower alkanoyl radical, R3 is -H(OH) or =O, R4 is H, halogen or a methyl radical, R1 and R2 are as defined above, X is H or a halogen atom and -C1-C2 is a <FORM:0895400/IV (b)/2> <FORM:0895400/IV (b)/3> group.  As ortho ester there may be used ethyl ortho-formate, methyl ortho-formate or ethyl ortho-acetate.